Source：科學60秒
Date：2008.12.03
Using Radar to Monitor Baby Breathing
[Radio sound:] “Northeast 480 you are cleared for landing, Northeast 480 you are cleared for landing.”That same radar technology that guides aircraft and tracks hurricanes could in the future keep track of a baby’s breathing. Engineers from the University of Florida have built a prototype radar baby monitor. The crib-mounted monitor detects movement of the infant’s chest using Doppler radar. If breathing stops, movement stops and the monitor sounds an alarm. Such a system should be superior to those that just send sound or video to the parents. The research will appear in the February issue of IEEE Microwave Magazine. IEEE is the Institute of Electrical and Electronics Engineers.The radar monitor that the researchers created is about the size of small book. The receiver indicates the baby’s breathing, as well as the state of the wireless connection with the monitor and the battery status. Future versions could also detect heartbeat through a higher frequency signal.[Radio sound:] “Mrs. Watson on Maple Drive, your baby is breathing normally, the baby is breathing normally.”
Words
hurricane：颶風，暴風雨，暴風
prototype：原型
crib-mounted：安裝在小兒床上的。 crib：小兒床，貯藏箱，糧倉，秣槽。mount：登上，爬上
Doppler：多普勒
Doppler effect（多普勒效應）：由於觀察者和波源的相對運動使波（包括光波、聲波和射電波）離開波源時的頻率和波到達觀察者時的頻率發生了變化。奧地利物理學家C.多普勒（1803～1853）首先解釋了這一效應。以聲為例，當聽者傾聽一輛開近的車上按響的喇叭時，他聽到的音調變高；車輛後退時，聽到的音調變低。它用於雷達，並可通過觀測天體光譜頻率的變化來計算天體的運行速度（大英百科）。
superior：上好的，高傲的，出眾的
receiver：接收器，接待者，收款員
Audio
Website address
https://www.scientificamerican.com/podcast/episode/monitoring-baby-breathing-with-rada-08-12-03/
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